<template>
  <div>
    <!--面包屑导航区域-->
    <el-breadcrumb separator='/'>
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图-->
    <el-card>
      <!--添加角色列表区域-->
      <el-row>
        <el-col :span='4'>
          <el-button type='primary' @click='addDiaglogVisible = true'>添加角色</el-button>
        </el-col>
      </el-row>
      <!--角色列表区域-->
      <el-table :data='rolesList' border stripe>
        <!--展开列-->
        <el-table-column type='expand'>
          <template slot-scope='scope'>
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for='(item1, i1) in scope.row.children' :key='item1.id'>
              <!--渲染一级权限-->
              <el-col :span='5'>
                <el-tag closable @close='removeRightById(scope.row, item1.id)'>{{item1.authName}}</el-tag>
                <i class='el-icon-caret-right'></i>
              </el-col>
              <!--渲染二级权限-->
              <el-col :span='19'>
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"  v-for='(item2, i2) in item1.children' :key='item2.id'>
                  <el-col :span='6'>
                    <el-tag closable @close='removeRightById(scope.row, item2.id)' type='success'>{{item2.authName}}</el-tag>
                    <i class='el-icon-caret-right'></i>
                  </el-col>
                  <el-col :span='18'>
                    <el-tag closable @close='removeRightById(scope.row, item3.id)' type='warning' v-for="(item3) in item2.children" :key='item3.id'>{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>

              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type='index' label='#' align='center'></el-table-column>
        <el-table-column label='角色名称' prop='roleName'></el-table-column>
        <el-table-column label='角色描述' prop='roleDesc'></el-table-column>
        <el-table-column label='操作' width='300px'>
          <template slot-scope='scope'>
            <el-button type='primary' icon='el-icon-edit' size='mini' @click='showEditDialog(scope.row.id)'>编辑</el-button>
            <el-button type='danger' icon='el-icon-delete' size='mini'
                       @click='removeRolesById(scope.row.id)'>删除</el-button>
            <el-button type='warning' icon='el-icon-setting' size='mini' @click='showSetRightDialog(scope.row)'>分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!--添加角色的对话框-->
    <el-dialog
      title='添加角色'
      :visible.sync='addDiaglogVisible'
      width='50%'
      @close='addDialogClosed'>
      <el-form :model='addForm' :rules='addFormRules' ref='addFormRef' label-width='80px'>
        <el-form-item label='角色名' prop='roleName'>
          <el-input v-model='addForm.roleName'></el-input>
        </el-form-item>
        <el-form-item label='角色描述' prop='roleDesc'>
          <el-input v-model='addForm.roleDesc'></el-input>
        </el-form-item>
      </el-form>
      <span slot='footer' class='dialog-footer'>
        <el-button @click='addDiaglogVisible = false'>取 消</el-button>
        <el-button type='primary' @click='addRoles'>确 定</el-button>
      </span>
    </el-dialog>
    <!--编辑用户角色对话框-->
    <el-dialog
      title='编辑角色'
      :visible.sync='editDialogVisible'
      width='50%'
      @close='editDialogClosed'>
      <el-form :model='editForm' :rules='editFormRules' ref='editFormRef' label-width='80px'>
        <el-form-item label='角色名' prop='roleName'>
          <el-input v-model='editForm.roleName'></el-input>
        </el-form-item>
        <el-form-item label='角色描述' prop='roleDesc'>
          <el-input v-model='editForm.roleDesc'></el-input>
        </el-form-item>
      </el-form>
      <span slot='footer' class='dialog-footer'>
          <el-button @click='editDialogVisible = false'>取 消</el-button>
          <el-button type='primary' @click='editRolesInfo()'>确 定</el-button>
      </span>
    </el-dialog>
    <!--分配角色的对话框-->
    <el-dialog
      title='分配权限'
      :visible.sync='setRightDialogVisible'
      width='50%'
      @close='setRightDialogClosed'>
      <!--树形控件-->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key='id' default-expand-all :default-checked-keys="defKeys" ref='treeRef'></el-tree>
      <span slot='footer' class='dialog-footer'>
          <el-button @click='setRightDialogVisible = false'>取 消</el-button>
          <el-button type='primary' @click='allotRights'>确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 所有角色列表数据
      rolesList: [],
      addDiaglogVisible: false,
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      addFormRules: {
        roleName: [
          {
            required: true,
            message: '请输入角色名',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          {
            required: false
          }
        ]
      },
      editDialogVisible: false,
      editForm: {},
      editFormRules: {
        roleName: [
          {
            require: true,
            message: '请输入角色名',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          {
            required: false
          }
        ]
      },
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        children: 'children',
        label: 'authName'
      },
      // 默认选中的节点ID值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created () {
    // 所有角色列表数据
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolesList = res.data
      console.log(this.rolesList)
    },
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮，添加新角色
    addRoles () {
      this.$refs.addFormRef.validate(async valid => {
        // 数据校验
        if (!valid) return
        //  可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加角色失败')
        }
        this.addDiaglogVisible = false
        this.getRolesList()
      })
    },
    // 展示编辑用户的对话框
    async showEditDialog (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色信息失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改用户对话框的关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 修改用户信息并提交
    editRolesInfo () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        if (res.meta.status !== 200) {
          return this.$message.error('更新角色信息失败')
        }
        this.$message.success('更新角色信息成功')
        this.getRolesList()
        this.editDialogVisible = false
      })
    },
    // 删除角色
    async removeRolesById (id) {
      // 弹框询问
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消删除，则返回值为字符串 cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败')
      }
      this.$message.success('删除角色成功')
      this.getRolesList()
    },
    // 根据ID删除用户权限
    async removeRightById (role, rightId) {
      const confirmResult = await this.$confirm('此操作将永久删除该权限，是否继续', '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      this.$message.success('删除权限成功')
      // this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限列表
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      // 把获取到的权限数据保存到data中
      this.rightslist = res.data
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys (node, arr) {
      // 如果当前 node 节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('角色授权失败')
      }
      this.$message.success('角色授权成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style scoped>
.vcenter {
  display: flex;
  align-items: center;
}
</style>
